I have tried both S10 and S21, they both keep frequently disconnecting from the car's head unit. I can't point to anything other than the operating system or the recent security patch.
Things I have tried:
The result is the same, the phone would completely disconnect from the head unit and try to reconnect again in a loop at a variable interval of 2-10 seconds.
Can someone please propose a solution as I'm left scratching my head on how Samsung's competent test team completely oversaw this bug?
Having the exact same problem with my S21 ultra on a 2015 CLA. Can't seem to get it to stop disconnecting, tried multiple cables. Apple CarPlay works flawlessly which is extremely frustrating.